What are peptides? The treatments promising weight loss and better skin, explained Vox RFK Jr. & claimed regenerative peptides like BPC 157 The Niche Everyone online is suddenly injecting peptides. But almost nobody understands the scienceor the regulation. The FDA recently shifted several peptides off the Category 2 safety risk list tied to compounding rules. First, that FDA Sends Warning Letters to More Than 50 GLP 1 Compounders and Manufacturers Wilson Sonsini FDA to weigh easing limits on peptides promoted by RFK Jr. NBC 6 South Florida